Can I load my own browser's user agent?

Yes, click 'Use my browser's UA' to fill the field with navigator.userAgent.

Is detection 100% accurate?

No, user agents can be spoofed or unusual; this uses heuristic pattern matching, not a canonical database.

Does this tool send the UA anywhere?

No, all parsing happens locally with regular expressions — nothing is transmitted.

Is my data uploaded to a server?

No. This tool runs entirely in your browser using standard web APIs, so your input never leaves your device and nothing is logged or stored on our servers.

Does it work offline and on mobile?

Yes. Once the page has loaded it keeps working without a network connection, and the layout is responsive so it stays usable on phones and tablets.

User Agent Parser

Parse a user-agent string into browser, engine, OS, and device type.

Support

Works Offline

Privacy First

No Login

No API

User-agent string

Paste any UA string, or load your current browser's

User-agent

Parsed result

Detected via pattern matching

Browser

Chrome

Version

120.0.0.0

Engine

Blink

Windows 11/10

Device

Desktop

Notes

How detection works

Detection uses an ordered table of regular expressions, checking the most specific browser signatures (Edge, Opera, Samsung Internet) before falling back to Chrome, Firefox, Safari, or Internet Explorer. Results are heuristic — user agents can be spoofed or incomplete.

About the User Agent Parser

Paste a raw User-Agent header to identify the browser and version, rendering engine, operating system, and device type using a compact table of regular expressions. Includes a one-click button to load your own browser's UA.

Examples

Chrome on Windows

Mozilla/5.0 ... Chrome/120.0.0.0 Safari/537.36

Output

Browser: Chrome, OS: Windows 11/10, Device: Desktop

Keyboard shortcuts

Copy the main outputCtrl / ⌘ + Shift + C
Download the resultCtrl / ⌘ + S
Share this toolCtrl / ⌘ + Shift + S
Reset the inputsAlt + R
Open the tool search paletteCtrl / ⌘ + K

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Frequently asked questions

Version 1.0.0 · Updated 2026-08-06 · Runs entirely in your browser